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|a 10.1021/acs.chemmater.4c00596
|2 doi
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|a pubmed24n1536.xml
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|a (NLM)39279907
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|a DE-627
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|c DE-627
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|a eng
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|a Doheny, Patrick W
|e verfasserin
|4 aut
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|a Low-Temperature Ferromagnetic Order in a Two-Level Layered Co2+ Material
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|c 2024
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|a Text
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 17.09.2024
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|a published: Electronic-eCollection
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|a Citation Status PubMed-not-MEDLINE
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|a © 2024 The Authors. Published by American Chemical Society.
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|a The magnetic properties of a 2D layered material consisting of high-spin Co2+ complexes, [Co(NH3NH2)2(H2O)2Cl2]Cl2 (CoHyd 2 Cl 4 ), have been extensively characterized using electron paramagnetic resonance, magnetic susceptibility, and low-temperature heat capacity measurements. Electron paramagnetic resonance spectroscopy studies suggest that below 50 K, the J = 3/2 orbital triplet state of Co is gradually depopulated in favor of the J = 1/2 spin state, which is dominant below 20 K. In light of this, the magnetic susceptibility has been fitted with a two-level model, indicating that the interactions in this material are much weaker than previously thought. This two-level model is unable to fit the data at low temperatures and, combined with electron paramagnetic resonance spectroscopy, suggests that ferromagnetic interactions between Co2+ cations in the J = 1/2 state become significant approaching 2 K. Heat capacity measurements suggest the emergence of a long-range ordered state below 246 mK, which neutron diffraction confirms to be ferromagnetic
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|a Journal Article
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|a Stenning, Gavin B G
|e verfasserin
|4 aut
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|a Brookfield, Adam
|e verfasserin
|4 aut
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|a Orlandi, Fabio
|e verfasserin
|4 aut
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|a Collison, David
|e verfasserin
|4 aut
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|a Manuel, Pascal
|e verfasserin
|4 aut
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|a Carr, Sam T
|e verfasserin
|4 aut
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|a Saines, Paul J
|e verfasserin
|4 aut
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|i Enthalten in
|t Chemistry of materials : a publication of the American Chemical Society
|d 1998
|g 36(2024), 17 vom: 10. Sept., Seite 8208-8216
|w (DE-627)NLM098194763
|x 0897-4756
|7 nnns
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|g volume:36
|g year:2024
|g number:17
|g day:10
|g month:09
|g pages:8208-8216
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|u http://dx.doi.org/10.1021/acs.chemmater.4c00596
|3 Volltext
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